/* 公共样式 */

* {
    margin: 0;
    padding: 0;
}

body {
    font-size: 12px;
    background-color: #F4F4F4;
    color: #333333;
    font-family: 微软雅黑;
}

a {
    text-decoration: none;
}

.red {
    color: red;
}

article,
section,
aside,
address,
nav,
header,
footer,
img {
    display: block;
}

li {
    list-style: none;
}

.hand:hover {
    cursor: pointer;
}

.changeImg:hover {
    opacity: 0.7;
    transition-duration: 0.5s;
}